Quarter	US dollars
1999-09-30	34999
1999-12-31	38199
2000-03-31	44160
2000-06-30	39418
2000-09-30	42077
2000-12-31	51684
2001-03-31	54286
2001-06-30	50739
2001-09-30	57467
2001-12-31	52450
2002-03-31	51199
2002-06-30	51747
2002-09-30	66905
2002-12-31	54544
2003-03-31	63408
2003-06-30	63111
2003-09-30	65473
2003-12-31	72791
2004-03-31	85104
2004-06-30	88850
2004-09-30	105229
2004-12-31	100048
2005-03-31	94951
2005-06-30	107181
2005-09-30	136056
2005-12-31	107917
2006-03-31	109225
2006-06-30	104926
2006-09-30	128844
2006-12-31	116428
2007-03-31	133339
2007-06-30	120524
2007-09-30	135018
2007-12-31	129956
2008-03-31	150436
2008-06-30	151638
2008-09-30	137897
2008-12-31	133013
2009-03-31	157501
2009-06-30	153655
2009-09-30	172273
2009-12-31	172974
2010-03-31	168882
2010-06-30	172184
2010-09-30	198001
2010-12-31	170433
2011-03-31	186988
2011-06-30	183833
2011-09-30	228609
2011-12-31	187772
2012-03-31	328879
2012-06-30	307464
2012-09-30	288799
2012-12-31	261259
2013-03-31	197335
2013-06-30	183261
2013-09-30	174634
2013-12-31	157540
2014-03-31	157957
2014-06-30	147221
2014-09-30	137295
2014-12-31	132239
2015-03-31	127139
2015-06-30	126005
2015-09-30	129417
2015-12-31	143197
2016-03-31	142390
2016-06-30	154957
2016-09-30	151339
2016-12-31	170943
2017-03-31	184952
2017-06-30	191244
2017-09-30	197830
2017-12-31	184671
2018-03-31	189109
2018-06-30	211117
2018-09-30	195738
2018-12-31	149313
2019-03-31	165042
2019-06-30	168174
2019-09-30	157909
2019-12-31	160380
2020-03-31	163360
2020-06-30	192443
2020-09-30	193110
2020-12-31	207229
2021-03-31	196328
2021-06-30	195635
2021-09-30	184404
2021-12-31	192164
2022-03-31	200985
2022-06-30	191498
2022-09-30	184468
2022-12-31	199500
2023-03-31	213897
2023-06-30	211536
2023-09-30	208859